Features: 100% brand new and high quality Connect this device in series with lamps or household appliances, and then turn the knob to adjust light, speed, voltage and temperature. Using a new type of bidirectional high-power thyristor, because the current can reach 2, it solves the problem of overcurrent caused by too small resistance of the electric furnace wire during cooling. It is convenient to adjust the output voltage of the mains, which can be adjusted arbitrarily between 50-220 volts to suit the use of electrical appliances. So as to achieve the effect of dimming, temperature regulation and voltage regulation. It can be used with large electrical appliances under 2000 watts. Due to the high power, ordinary household appliances or small factories are enough. Applicable electrical appliances: such as: electric furnace, water heater heat adjustment, lamp dimming, small motor speed adjustment, electric soldering iron temperature adjustment, etc. The package includes: 1 piece x voltage regulator Specifications: Material: Metal , Plastic Input power supply voltage: 110V250V AC Output voltage: 50V-250V (output voltage = input power supply voltage) Maximum output power: 2000W Maximum output current: 2 Voltage adjustment range: 50V-250V AC (output voltage = input power supply voltage) Operating environment temperature: -20C-40C Size: approx. 35x27 mm/ 1.38x1.06 inches